CN205538465U - A device for determining material true stress - Google Patents
A device for determining material true stress Download PDFInfo
- Publication number
- CN205538465U CN205538465U CN201620094091.4U CN201620094091U CN205538465U CN 205538465 U CN205538465 U CN 205538465U CN 201620094091 U CN201620094091 U CN 201620094091U CN 205538465 U CN205538465 U CN 205538465U
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- China
- Prior art keywords
- true stress
- display
- circular base
- data line
- data transmission
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a device for determining material true stress, includes laser rangefinder and display, laser rangefinder includes annular base, and this annular base is annular housing, the annular housing average mark is a plurality of unit casings, and it has a small -size laser range finder to settle in every unit casing, the annular base's that every small -size laser range finder corresponds inboard upward opening has an opening, and it has transparent baffle all to cover on every opening, every small -size laser range finder's data transmission line connection to data transmission bus, the output of data transmission bus has the data line interface, the display includes display screen and display data line, the utility model discloses utilize the change of each surface point of laser rangefinder principle survey test piece and distancer distance for calculate test piece cross sectional area, thereby calculate material true stress. Make whole device more stable through setting up the handle, guarantee that whole experimentation device does not have the displacement.
Description
Technical field
The utility model relates to a kind of measurement and calculating device, is specifically related to a kind of device for measuring material true stress.
Background technology
Using Universal motor to measure material stress strain curve constantly, generally individually using and measure its apparent strain, the value of nominal stress,
I.e. think and keep constant in whole stretching and compression process middle section area, calculated ess-strain.But actual stretching becomes
Shape has constriction, and the most simple proportionate relationship meaning is little, and the stress strain diagram thus drawn is likely to carry to people
Serving the information easily misunderstood, the performance such as allowing people be mistakenly considered limit stress point material itself can decline, but real
On border incision position area (this area just represent break moment real by stress plane) be the least, thus material is true
The namely material hardening risen during real intensity.Logarithmic strain refers to that the pulling force of Universal motor suffered by material or pressure are with certain for the moment
Carve the ratio of real area of section.But not there is the merit of the real time measure one or several area of section of test specimen due to Universal motor
Can so that the mensuration of material true stress has difficulties.The nominal stress of present stage employing and true stress reduction formula are based on body
Long-pending constant theory, exists with actual conditions and comes in and goes out so that scaling results is inaccurate.And present finite element software such as ABAQUS etc.
Carry out mechanical analysis requiring, user inputs complete true stress-strain curve, it is therefore necessary to it is real-time that design one measures material
Area of section, to obtain the measurement apparatus of true stress, provides Parameters of constitutive model accurately for finite element software.
Summary of the invention
The purpose of this utility model is, proposes a kind of device for measuring material true stress, and this device passes through the real time measure
Test specimen cross section geometry, for calculation testing piece true stress, thus sets up constitutive model service for all kinds of finite element softwares.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of device for measuring material true stress, including laser ranging system and display；Laser ranging system includes ring
Shape pedestal, this circular base is toroidal shell；Toroidal shell is equally divided into multiple unit housings, is mounted with in each unit housings
One small industry steam turbine；An opening, each opening is had on the inner side of the circular base that each small industry steam turbine is corresponding
On be all covered with transparent baffle；Circular base is provided with a data line interface communicated with toroidal shell；Each miniature laser is found range
The data line of instrument connects data transmission bus；The output of data transmission bus has data line interface；Display includes display
Screen and display data line；Display screen is by the data line interface of display data line with the data transmission bus of laser ranging system
Connect.
Further, a week in described toroidal shell is uniformly divided into 20 unit housings.
Further, being symmetrically installed with two handles outside described circular base, handle is for being fixed on Universal motor by circular base
On.
Further, described handle uses telescopic rod, and the length of handle can regulate.
Further, the material of described circular base is plastics, rubber or metal.
Further, described opening be shaped as rectangle.
The utility model has the advantage that
1, laser distance measuring principle is utilized to measure the change of each surface point of test specimen and distance by stadimeter, the space real-time to determine each point
Position, and then obtain the area of section under any applied force effect any time.
2, make whole device more stable by arranging handle, it is ensured that whole experimentation device non-displacement.
3, the small industry steam turbine of replaceable different accuracy meets required precision, and applicability is strong, it is simple to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic diagram of the small industry steam turbine arranged in unit housings.
Fig. 3 is the utility model installation site schematic diagram in real work.
Reference:
1 laser ranging system；2 unit housings；2-1 small industry steam turbine；2-2 transparent baffle；2-3 data pass
Defeated line；3 data transmission bus；4 data line interfaces；5 handles；6 screen data lines；7 displays；8 show
Display screen；9 test specimens；10 Universal motors；11-is for measuring the device of material true stress.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, the device for measuring material true stress of the present utility model, including laser ranging
Device 1 and display 7；
Laser ranging system 1 includes circular base, and this circular base is toroidal shell；Toroidal shell is uniformly divided into 20 cell enclosure
Body 2, is mounted with a small industry steam turbine 2-1 in each unit housings 2；Each ring corresponding for small industry steam turbine 2-1
Have an opening in the inner circle of shape pedestal, each opening is all covered with transparent baffle 2-2；Transparent baffle 2-2 is for not shadow
The range finding work ringing small industry steam turbine 2-1 prevents the material damage small industry steam turbine 2-1 of splashing simultaneously.
Circular base is provided with a data line interface 4 communicated with toroidal shell；The data of each small industry steam turbine 2-1 pass
Defeated line 2-3 connects data transmission bus 3；Data transmission bus 3 has output by data line interface 4.
Display 7 includes the display screen 8 for 20 laser range finder readings of display and display data line 6；Display 7 leads to
Cross display data line 6 (connecting line 6) to be connected with the data transmission bus 3 of laser ranging system；Display data line 6 is used for
Accept the data of the i.e. data transmission bus 3 of the data measured by laser ranging system output；
Optionally, being symmetrically installed with two handles 5 outside circular base, handle 5 is for being fixed on Universal motor by circular base.
Optionally, handle 5 uses telescopic rod, and the adjustable in length of handle 5 is to adapt to the Universal motor of each model.
Optionally, the material of circular base is plastics, rubber or metal.
Optionally, opening is rectangle.
In the present embodiment, for 20 range readings in display 7 gained each moment, operating personnel set up according to respective distances
Coordinate system, determines the locus of test specimen respective points, so that it is determined that test specimen area of section, calculates the true stress in corresponding moment.
The utility model in use, is carried out according to following operating procedure:
Step 1, test specimen 9 to be measured is placed in Universal motor 10 assigned position；
Step 2, the device 11 being used for measuring material true stress is placed in the position in the middle part of test specimen, with reference to Fig. 3；
Step 3, open laser ranging system 1, for 20 laser range finder readings of display when record Universal motor 10 is not actuated
Reading on display screen 8；
Step 4, startup Universal motor 10, record each moment Universal motor 10 and put on the pulling force of test specimen 9 and by operating personnel's record,
Reading on the display screen 8 of 20 laser range finder readings of record display simultaneously, is calculated corresponding surface by operating personnel according to reading and amasss；
Step 5, gained value of thrust in above-mentioned steps 4 is i.e. obtained divided by area the test specimen true stress in this moment.
The above, be only preferred embodiment of the present utility model, not impose any restrictions the utility model, every according to this
Any simple modification, change and the equivalent structure transformation that above example is made by utility model technical spirit, all still falls within this
In the protection domain of utility model technical scheme.
Claims (6)
1. for measuring a device for material true stress, including laser ranging system and display；Laser ranging system includes
Circular base, this circular base is toroidal shell；Toroidal shell is equally divided into multiple unit housings, disposes in each unit housings
There is a small industry steam turbine；An opening, Mei Gekai is had on the inner side of the circular base that each small industry steam turbine is corresponding
Transparent baffle it is all covered with on Kou；Circular base is provided with a data line interface communicated with toroidal shell；Each miniature laser is surveyed
The data line of distance meter connects data transmission bus；The output of data transmission bus has data line interface；Display includes showing
Display screen and display data line；Display screen is connect by the data wire of display data line with the data transmission bus of laser ranging system
Mouth connects.
2. the device for measuring material true stress as claimed in claim 1, it is characterised in that in described toroidal shell
Within one week, it is uniformly divided into 20 unit housings.
3. the device for measuring material true stress as claimed in claim 1 or 2, it is characterised in that described circular base
Outside is symmetrically installed with two handles, and handle is for being fixed on Universal motor by circular base.
4. the device for measuring material true stress as claimed in claim 3, it is characterised in that described handle uses can be stretched
Contracting bar, the length of handle can regulate.
5. the device for measuring material true stress as claimed in claim 1 or 2, it is characterised in that described circular base
Material be plastics, rubber or metal.
6. the device for measuring material true stress as claimed in claim 1 or 2, it is characterised in that the shape of described opening
Shape is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094091.4U CN205538465U (en) | 2016-01-29 | 2016-01-29 | A device for determining material true stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094091.4U CN205538465U (en) | 2016-01-29 | 2016-01-29 | A device for determining material true stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205538465U true CN205538465U (en) | 2016-08-31 |
Family
ID=56773463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620094091.4U Expired - Fee Related CN205538465U (en) | 2016-01-29 | 2016-01-29 | A device for determining material true stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205538465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458929A (en) * | 2018-03-22 | 2018-08-28 | 安徽工业大学 | A method of measuring material true stress |
-
2016
- 2016-01-29 CN CN201620094091.4U patent/CN205538465U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458929A (en) * | 2018-03-22 | 2018-08-28 | 安徽工业大学 | A method of measuring material true stress |
| CN108458929B (en) * | 2018-03-22 | 2020-05-12 | 安徽工业大学 | Method for measuring true stress of material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170129 |